terrafirma said:In your profile settings, you can add a watermark to your pics.
Also,when you upload a pic you should check to make sure you have reserved your rights to this photo.
Hope this helps.
sooby said:As far as I understand it photos on the internet are automatically copyright and permission is required for their use unless clearly indicated otherwise.
Australis said:One thing to note (unless @Dave has changed this since) is that when you change your settings to add a watermark, it only does it for new uploads (it does not apply it to existing uploads).
You might want to ensure you have the watermark option set, request your existing images are deleted and then re-upload them.